Cross-head.



slipper openings are undercut, tapered or beveled as indicated at 9 in Fig. 2, the di- Inensions of the opening decreasing toward the respective face of the cross head; and

K the end'wall is also undercut or beveled as indicated at 10 in Fig. 1. The face of the side andl endwalls are machined to provide an extended seat for the slippers. The bolt hole 11 extends throughthe side walls of each slipper opening toward the rear end thereof and transversely ofthe cross p. head, as shown in Figs. 2 and 3; and a bolt hole `12 extends through the end wall of cach the inner face of each slipper is a shoulder slipper, opening longitudinally of the cross head.

` rIhe slippers are indicated by the numeral 13 and each is provided with a bearing brass 14 formed to fit the guides. Projecting from lacomprising two side walls and an end wall, the outer faces of which are undercut, tapered or beveled, inversely with respect to `the bevel of the corresponding portions of the slipper openings.. This construction of the slipper is shown in Figs. 1, 2 and 4, from -linspection of which it will be seen that the slippers are slipped into position through .the open end of the slipper openings 'in a dove-tail engagement with the cross head. Toward the rear end of each slipper there are cored openings or slots 15 which correspond to and aline with the bolt holesll in the side walls of the slipper openings and Vclear the bolt one-eighth of an inch all 35 around. At the forward end there is a bolt hole 1G in the slipper. corresponding to and alining with the' bolt hole 12 in the cross head.l All of Athese bolt holes and slots do not have to be reamed.

Each slipper is held in place by two rough bolts, a bolt 17 passing through the bolt with the beveled faces of the slipper shoulders, and because of the incline or taper of these faces, the slippers are drawn into tight engagement with the extended seat 20 of the slipper opening. walls. It will be understood of course that those portions of the slippers which rest on the surface 20 are also machined. W'hen the nuts 19 of the bolts 18 are tightened, it brings the beveled surfaces at 10 together and draws the slipper into contact with the seat 20. AIn assemblage, however, the bolts 18 are first tightened to properlyposition ythe slipper with respect to the cross head. From the foregoing it will be seen that an extended bearingsurface for the slippers is provided not only by the seat 20 but also by the contacting beveled faces which are (fo-extensive, with the walls ot the slipper openings. The advantage of such an `extended bearingsurface or scat between thc cross head and the slippers is that thc liability of wear is reduced to a minimum, it not made, practicall)7 negligible. Further'- morc in the event that thc slippers become loose, they can be tightened merely by turning up the nuts 19. It will be apparent from the foregoing that the construction is simple, that the bolts are relieved of shearing stresses, that a superior bearing is provided for thc slippers on the cross head, and that the device is inexpensive, this latter advantage resulting from' the tact that it is not necessary to ream the bolt holes nor to use machine turned bolts; nor to replace the bolts or rereani the bolt holes when tightening a` loose slipper. In addition', the number of bolts required is reduced, and it is likewise possible to standardize the parts so that in the event of breakage, a new slipper or new bolts may be substituted. Rough bolts can be readily replaced because the bolt holes are considerably larger than the bolts. By providing beveled faces at both the sides and the forward end of the slipper openings and slippers, the slippers are held against both longitudinal and lateral displacement l and the area of the contacting faces is greatly increased, with a consequent increase in resistance to longitudinal movement of the slippers. lVhile the slippers are rigidly clamped in position, and the liability of their pounding loose is reduced to a minimum, yet they can be readily detached when it is found necessary to reline or replace a slipper. Other advantages will occur to those skilled in the art.

I claim 1. A cross head device comprising in combination a cross head having a slipper-receiving recess the side and end walls of which arc beveled, a slipper having an oppositely beveled portion adapted to be slipped into said recess, la transversely-extending clamping element and a longitudinally extending clamping element adapted to clamp said beveled ortions together transversely and longitudinally of the cross head whereby to draw the slipper into engagement with the cross head.

9.. A cross head device comprising in combination a cross head having an under-cut slipper-receiving groove open at one end and closed at the other, a slipper having an oppositely under-cut shoulder fitting said groove and having a bolt-'receiving opening, a bolt passing transversely through the cross head'and said shoulder to clamp the side walls of the groove against said shoulder, and a bolt passing longitudinally through the end wall of the groove and into the boltranged when chuiiperi together substzuitiul transversely i0 slid@ umm @zich other and draw the slipper toward i111@ cross hemd zigunisits scat, und means ljor dumping versey.

4. A cross head device Comprising in 30m- .bisi-on a cross head having' :i sent, a Sip, per aizipted 'to taks against Said sont, thc @ross head and slipper; having; oppositeiy femme/(. Coaching sloiiing portions arranged when damped igether substantially 'trailsfersely to slide upon @zich other and draw :the slipper toward the cross head against its seat, :mi means for clamping said ,portions @gai-hel substantially tranSi/erSa-ily, said means sxie'ndiiig through both dross blend :imi siipper and having i 10st motion conne/'c` ioii with one of hm.

fr crss head devies coiuprisiiig in C0mbnasion i cross head' and a, Slipper7 erich inning; zin oppositely formed concting bsveheri portion arranged waan clamped i10- gefher siib:3,zmtinly transversely to sip upn @zich oiwr zuid f ii'ziw h@ siipper i0- vzirfl *die Cross head? sind ine-rms for Ciamping said beveed, peir'imis iogether substaniiafly trains ferse'y.

(S. A. cross head (ievice comprising in com- .biiizizion i @ross irrigui' anni fr slipper, each having an opposiy fori'ned bonding 'said abutment l mreifffi p @pilier si upm; Chri;

smid

gjetiier subsnuiniiiy iii admit-ted to pre/Veni A. cross head and Sippmp chunpingmem. Y

ES'. fn :i reciproca/ti Suid slipper i k iiis its se: prising' revm'sa-,jv :form mi mf on the cross mad :imi mpi, cfu il;

:i dumping ummm :1i i i, portions t( lv 'hevig the v i l, o" sind, Y*portions relieving; ha

menus, si? shearing s-rossffs.

"i tesimoiiy whe/moi" i 

